Hand drill



Patented Sept. 20, 1927.l

1 PAT omen.

CHRISTIAN Bomann AND HARRIS .n coox, o ii` NEW BRITArN, CONNECTICUT,` AssIGNons To THE sfiiANIinYT wonxs, QFNEW BRITAIN, coNNEoTI'dU'TQn oo'nronn'l 15e-.NDV DRILL.;-

, n Applicationledlovember 9, A19,25. Serial1\T o.'67,728..

The presenty invention, relates :to hand drills of; thertypei having ,.a, body por-tion or rame,'ajspindle.journalled1therein, and a gear. for.- driving said :spindle and provided l with L aV handle.; forIv turning ythe same.

rBhe. aim ofi' tlie invention` is, to provide` a simpl-andfeconomical arrangement wherein the driving gear and: the-handle-.forj turningth'essamc may be-,very :readily assembled and:v disassembled :and: eiectivelyl secured; in as sembled relation;v

O .therwobjects will be in part obviousand in part porinVteflio'iit` morelyin detail hereinV after. f

The invention accordingly consists in the features of construction, combination of elements and arrangement of parts which will be exemplified inthe construction herein`` after set forth, and the scope of the application of which will be indicated in the appended claims. I

In the accompanying drawings: .Figure 1 is an elevational view of our improved'drill; and

Fig. 2is a sectional view taken substantially on line 2-2 of Fig. 1.

Referring to the drawings in detail, ci denotes the frame or body portion which is in the form of a shank in one end of which is journalled a spindle s provided with the usual chuck pb. On the outerl end of the body portion or shank is a hand grip c. .Projecting r laterally Y from the body portion is a bearing on which is journalled a driving geard meshing with a pinion e fixed to the spindle. Y

The bearing for 'the drive gear d is provided on a stem 10 which Vprojects through, and has a driving lit in, a diametrical opening in the shank a. Oneend of this stem is enlarged to provide the bearing 11. The

y cludes ametal arm 14 anda knob 15 on the outer end of the arm.

The gear d is secured on the bearing 11v by.

the handle, and the handle is held in place r inthe following manner.` VThe sup-port for the gear d projects beyond' the planel of the gear and is provided with a circumferential groove 16l and a head 17, The arm 14 is provided, adjacent` its innerv end, with anl opening having a, circular portion 18v of; slightly greaterA diameter than the head 17, so tliattheliead may beslipped through'theV opening. The ope-ning also has a portionf`19- of .lesserV diameter than. the head: 177 and.. of

substantially the same diameter. asthatlpore tion ofrthe stem within. the groovel." TheA arm 14X is secured to the. gear` loy .means of .a screw 20gthreaded into a-'bossi .21. of. vthe gear..

then'the gearisslipped ontothe bearing 11.

The liandle is .thenl positioned: over. the? stem Y with the enlarged portion 18 of the opening in registry with the head 17. The 'hair dle is then moved radially with respect to the gear to bring the reduced portion 19 of the slot or opening into engagement with the groove 16 and under or behind the head 17, as shown in the drawings. The screw 2O thickness of the handle arm 14' are-substantially'equal to the distance between the body portion ,a and the head 17 which means that, when the partsV are assembled, the gear is locked against endwise or axial movement by the handle arm, and the handle arm is secured to the stem by the head 17. Preferably, the thickness of the handle arm 14 is equal to the width of the groove 16 so that the edge about the portion 19 of the opening will itrsnugly in the groove. The stein 10 not only forms a bearing for the gear and a portion of the means for locking the handle and gear in place, but also serves as a support for the laterally extending hand grip 13.

From the Jfo-reging description, taken in connection with the accompanying drawings, it will be clear that our improved drill coinprises kbut a relatively few number of parts, the handle arm and the stem 10 may loe very economically manufactured, and the parts may be very quickly assembled and, when y is then inserted through the handle -arm ll it theyr ere assembled, they :ire securelyY held together in the proper relation.

ille elninl in; our invention:

Il., il. hond drill having; zr holly poi'tion` n npndle jonrnnlled therein. :t chuck on smid spindle, :t pinion on seid spindle, n gen1.' 'for driving' seid pinion, zi lixed stud on Seid body portion :ind on which Seid gear is ionrnnllecl, f-:nid .etnd having' it@` outer enel extending' hojt'tiind said gein' sind provided with :i eir- -mnt'erentinl grom'eA` :i lnnidle having' :in erin provided with :i portion aid-opted to en ginge in Seid groove whereby to hold :mid peni' on nnid etud. und menne' Afor eeen'ringmid handle against movement relative to :leid geni'.

A, hund elrill hnvii'igll :i hod3v portionm u spindle jonrnnlled therein, :i ehnek on :mid Spindle. n pinion on seid spindle. e. gen1' tor driving Seid pinion. :i sind projectingv letierellv from eziirl hotly portion and on n'hieh Suid gein.' is ionrnnlleih seid stud ezlztending l fond seid gent' :intl having' :1 eireinnterentinl groeve, i handle having' an erin provided With a, slot with n portion adopted to slip over the outer enel of said Stud and with :i second )ortiion adopted toengage in seid groove whereby to hold Suid gear on Suid stud, end a, :screw lor seeuring Suid handle against movement; relative to Seid geur.

3. A lnindtlrill having' :t hotly portion7 e handle on one end thereof, n spindle journelled in the other end thereoft zr ehuel on seid spindle, n pinion on seid, spindle, o `rear tor driving said Spindle, :i stud hevingg; u driving-j fit1 in seid hotly portion and provided with n hez-irinn' on ivhieh Smid geur journelleel, Suid stncl extending` beyond eziid geni' and having :1` Cirennrferentizil groove, :i handle having;l :in erin ln'ovided nl', one enel with :1` slot, enid slot. hnvinfgj a portion adopted to slip over llie end ol seid stud :ind n reduced portion engngenhle Within Suid groove whereby to hole seid gear on said etnfl, und ineens: :for Securing' Seial handle to sind eje-in' and againstr inovelnent relative thereto.

CHRISTIAN BODMER. HAR-RIS J. COOK. 

